Every electronic component act as a heater and emits light if you operate it wrong enough

That and the diagrammatic goatse.

one of the oldest jokes, but always appreciated 😀

Caught me off guard Hahaha

Diode = voltage dependent resistor sort of

would love to hear the rest of the story actually hahaha

Well, they didn't give me the specs, but it's still in my workshop getting used quite a bit. Manufacturer is called MediWatch UK, bought over by Laborie.

Say you inherited it from a family member who passed in a horrific tragedy. You found a note from the deceased saying their dying wish was for you to acquire the specs of the device to complete their life's work.

When you mean horrific tragedy........I'm assuming you don't mean electrocuted by said isolation transformer.....LOL!

@@IanScottJohnston pfffhahahaahaha XD

I never really noticed them before but after watching a few videos they are riddled with them and really makes them enjoyable.

As a digital person, I tend to have the same viewpoint.

and the excess heat can be used to heat the oven for the reference, neat!

Or l a s e r s

A RTG usually is a peltier device. Apparently thermals are the reason for not using a super-radioactive and probably illegal discarded RTG, and no other reason... :)

@@KnowledgePerformance7 It should lasers yes. Pref. RGB ones.

If not being solid state is not a deal breaker, one could simply mechanically couple a motor to a generator for virtually absolute isolation.

I think he was purposefully leaving it plugged in since batteries are perfect isolation and he just wanted to compare the transformer isolation.

Huh, that sounds demanding. Did the core of the transformer actually pass through the shield? Was there anything to prevent the shield from acting like another winding on the transformer (slits, gaps, etc...)?

400 euro for one watt?

​@@frosty129 Actually even more. For €400 you only get the small power converter for about half a Watt. And you'll still need a laser to actually send the power. But if your sensor or actor is located near a high voltage source (>10kV), in a noisy environment, far away from your control system, it becomes a rather convenient and easy solution.

Now if he'd used spurving bearings be would have dropped at least a decimal on those ppms

LOL me too, but your humor made my day! :-)

This is just silly. You can't use tremie pipe on odd-numbered conductors mate

@@Tikorous Not even if he tightens the flingnut on the reversible trom-joint?

@@friedmule5403 we're trying to have a serious conversation here

Hahaha nice catch!

Apparently back in the day the military used these to do frequency conversions as well, usually between 400Hz and 60Hz. Since maybe the 70's solid state electronics got good enough to replace those.

They used to be used in a lot of machine tools (lathes/mills/grinders/etc) to allow for more optimal spindle speeds via frequency conversion.

Can't beat a meter of insulating shaft for isolation.

@@power-max if by "back in the day" you mean "today", you are correct.

@@AuxiliaryPanther I work for the US army and we do not use motor generator pairs for frequency conversion. There are a number of different MIL COTS converters we use. They all use solid state switch mode converters and inverter stages. AFAIK they work by rectifying the 115VAC 400Hz to DC, with power factor correction, then feeding an inverter stage to convert that back into AC, which is filtered with some output LC circuits. Usually these are fed with 12, 10, or 8 AWG MS22759/43 or /87 cables (200°C and 260°C, respectively.)

Same thing I wanted to point out.

I have lit up LEDs and even neons from such things! And felt it too haha

Cutting out the Y capacitors will remove the return path for high frequency electromagnetic interference (EMI). Which means taking them out may cause other types of interference with the sensitive measurements. There are other ways to design power supplies to achieve low EMI. It is much simpler to avoid the designs that require the Y capacitor.

Sorry to disturb you, but I am desperate. :-) I think about everything he is doing in this video, has taken a space rocket over my head. May I ask what he is measuring and what it influences?

@@friedmule5403 common mode rejection. The voltage on output of the charger relative to earth ground. Due to capacitive coupling, there will be a small current that can flow, and a voltage of up to nearly 100V that can develop. It can cause problems with precise measurements and audible noise in audio circuits.

Delighted to see one of my favorite UKpostsrs in the comments of my newest addictive channel. Marco reminds me of a combination of FesZ and GreatScott. Love both of your work

Interesting, thanks. I have a 500VA (probably 1980s) Topaz unit that I occasional use (mostly for the safety benefits if I am working on powered equipment where the mains wiring may be exposed. But it's good to have further understanding.

I've got several .0005pf Topaz Ultra Isolators. Step one on all of them was to verifying correct tap wiring and step two was to tighten EVERY connection point (including torquing the case through-bolts). All have brought obvious improvements in sound quality in each respective system. I size them for being *at least* 3x the max current of all devices connected. I have had better luck with these than my old PS Audio P15 power plant.

is that a diy optoisolator?

Took me a minute, nice one

i just don't know why youtube has not recommended before. Such a good channel, but seems to be well hidden in the deep caves of youtube.

Medical grade power supplies can have capacitance to earth as long as the earth leakage current requirement is met. Up to 5mA is allowed, although rarely is the measured value more than 500uA. Medical power supplies have a lot of requirements, but the most relevant here relate to the #1.) Construction of the transformer/PCBA (to provide sufficient isolation) and #2.) Output (AKA "patient" or "touch") leakage current to earth, which mostly depends on the value of Y-class capacitors across the primary-to-secondary isolation boundary. In a non-medical power supply, up to 500uA "touch" current is allowed. In a Type-B/BF medical power supply, up to 100uA "patient" current is allowed In a Type-CF medical power supply, up to 10uA "patient" current is allowed (All these currents referenced to a standardized 1K or 2Kohm measurement resistor.) Basically, low leakage medical power supplies need to use small value Y-capacitors (or none at all), and usually need to play games with the transformer to keep the EMI low without using large value of Y-capacitors. For this application, Type-CF has the lowest primary-to-secondary capacitance, and would probably be a good pick.

@@SolidStateWorkshop Hey! I recognised your profile pic instantly! Found your videos great when doing my introdoctory course in electronics :) Hope you are doing well

@@txcpnae It’s always so nice to hear that. Thank you. Once my life settles down a little, hope to put out some more 😉

No, "medical grade" means you can eat it and you won't get sick.

@@SolidStateWorkshop In medical ultrasonic cleaners I have seen them get dangerously close legally to the legal line at ~490uA.

(And, determination, of course!)

That's essentially the approach discussed at 15:48 with the Fluke thermometers.

@@AJMansfield1 Damnit, I was just hunting down that timecode, and you beat me to it.

That was my first thought, flying capacitor power supply -- to be safe, think you would want to use relays to fly the cap, but that's a new can of worms.

Or an array of super capacitors that you charge and then disconnect to discharge on the DC side

Really you only need two super capacitors and then just have a timer or *gasp* a micro controller on each side controller a realy or two with some sort of opto coupler interrupt pin so you're never actually connected to mains. Like charging a bunch of batteries and switching them out but faster

AND by using a high quality mains Xformer and a SMPS together, the capacitance of them will be connected in series -> Further reduction of total leakage capacitance.

That wasn't really what I expected guys who look at resistors to look like.